Harrow.



UNTTEE STATES PATENT OFFICE.

JOHN HENRY DAVIS, OF ELIZABETHTOWN, KENTUCKY.

HARROW.

SEECIFICATION formingpart of Letters Patent No. 722,287, dated March 10, 1903.

Application filed May 29,1902.

To all whom zit 7mo/y concern.-

Be it known that I, JOHN HENRY Davis, a citizen of the United States, residing at Elizabethtown, in the county of Hardin and State of Kentucky, have invented a new and useful Harrow, of which the followinpr is a specification.

My invention is an improved harrow; and it consists in the peculiar construction and combination of devices hereinafter fully set forth and claimed.

In the accompanying drawings, Figure l is a side elevation, partly in section, of a harrow constructed in accordance with my invention. Fig.` 2 is a top plan view of the same. Fig. 3 is a detail sectional View of one of the barrow-teeth.

In the embodiment of my invention here shown I employ an axle 1, on the ends of which are a pair of traction and supporting wheels 2. A suitable tongue or other draft element 8 is attached to the axle, and a platform 4.- is at the rear of the tongue and on the axle. The frame thus constructed is provided with a seat 5 for the driver.

A revoluble barrow-cylinder 6 has its bearings in the rear ends of a pair of supportingbars 7. The front ends of the said supporting-bars are pivotally connected to the axle 1, as here shown, or they may be otherwise pivotally supported, and I do not limit myself in this particular. A lever 8, which is mounted on the frame, has an arm 9, which is connected to one ofthe bars 7 by a link or other suitable connecting element 10, and hence by means of said lever and said bars 7 the revolu ble barrow-cylinder may be raised and lowered, as will be understood. A segment 11 is provided and the lever 8 has a locking-dog 12 of the usual construction to engage the segment, and hence the lever may be locked at any adjustment to support the revoluble harrow-cylinder at any desired elevation.

Each of the cylinder-supportingr bars comprises a pair of sections 7n 7b, exibly connected together, as by a pivotal joint 7C, and the rear section 7b has a forwardly-projecting stop-arm 7d to engage the under side of the section 7a. Ience the flexibly-jointed supporting-bars may be bent downwardly, but not upwardly. This enables the barrow-cylinder Serial No. 109.530. (No model.)

to be raised by the supporting-bars and also enables the barrow-cylinder when the same is in operation on the ground to rise and pass over an obstruction, such as a stump or stone.

The revoluble barrow-cylinder may be of any suitable construction. As here shown, it comprises a plurality of circular heads 13, disposed at suitable distances apart on an axleshaft 14, and bars 15, which are secured on the peripheries of the heads, are disposed longitudinally of the cylinder and connect the heads together. The bars carry teeth which project from the outer sides thereof and are disposed radially with respect to the harrowcylinder. At one end of the barrow-cylinder shaft or axle is a sprocket wheel 16. A sprocket-wheel 17 of greater diameter rotates with o ne of the wheels 2, and an endless sprocket-chain 18 connects the said sprocketwheels. Hence the harrowcylinder is revolved by the power of one of the tractionwheels 2 and at a higher rate of speed than would be the case if the harrow cylinder were rotated by frictional contact with the ground.

In operation the barrow-cylinder is lowered to cause its teeth to enter the soil to any desired extent, and the lever 8 is then locked, so that the weight of the revoluble barrow-cylinder is carried by the supporting-bars 7. As the machine advances the teeth carried by the revolving barrow-cylinder cut through and break up the clods, thereby placing the ground, which has been previously plowed, in excellent condition for planting. The harrow-teeth are preferably of the form shown in Figs. 1 and 3, being sharpened at one edge, as at 19, beveled on one side, as at 20, and beveled only for a portion of a distance on the opposite side. The barrow-teeth are designated by the numeral 22. In practice I prefer to construct the barrow-teeth with shanks '23 at their inner ends, which are angular in cross-section, to t in corresponding openings in the bars l5 and provide them with threaded sections or shanks 24, on which are screwed nuts 25, that clamp the teeth to the bars. Hence the barrow-teeth may be readily removed and renewed or sharpened when they become broken or dulled.

My improved harrow is provided with a roller 26, which operates in advance of the ICO revoluble barrow-cylinder, and is here shown as being journaled in the lower ends of a pair of arms 27, which have their upper ends pivotally connected to the axle-shaft 1, as at 28.

This roller may be of any suitable construe# tion and may be connected to the harrow by any suitable means. I do not limit myself to the use of the roller in connection with my improved barrow, as the same may be dispensed with, if preferred. Vhen used, the roller breaks the clods in advance of the revoluble harrowcylinder and facilitates the action of the latter in preparing the ground for planting.

It is obvious that the arms 27 may be of such length as to cause the roller 26 to operate in rear of the revoluble barrow, as indicated by dotted lines in Fig. 1 of the drawings. When the roller is thus used, it leaves the ground smooth after the harrow, ready for the planter. Hence my improved barrow may be used effectively on land in any condition, whether hard and full of clods or soft and friable.

Having thus described my invention, I claim- 1. In an implement of the class described, the combination of a Wheel-supported main frame, a barrow-supporting frame having jointed side pieces, the front members of which have pivotal connection with the axle of the main frame, a shaft connecting the rear members of said frame, a rotary barrow elef ment supported upon said shaft, projections upon the rear members of the barrow-supporting frame extending under the rear ends of the front members of said frame, adjusting means for the latter, sprocket-wheels upon one of the traction-wheels and upon the shaft carrying the rotary barrow element, and a chain connecting said sprocket-wheels.v

2. In an implement of the class described, the combination of a Wheel-supported main frame, a pivotally mounted frame having jointed side pieces, a rotary harrow element at the rear ends of said side pieces, the latter being so jointed together as to be capable of flexing downwardly, but not in an upward direction, and means for transmitting motion to the rotary harrow element from one of the traction-Wheels of the main frame.

-In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

JOHN HENRY DAVIS.

Witnesses:

S. I-I. BUSH, VILL SLODER. 

